./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s32if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s32if.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 371b46898ac196d32c6a3ef4c51b315e7fba4a376d0f69ff343a10a3b7c63d98 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:42:49,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:42:49,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:42:49,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:42:49,207 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:42:49,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:42:49,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:42:49,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:42:49,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:42:49,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:42:49,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:42:49,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:42:49,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:42:49,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:42:49,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:42:49,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:42:49,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:42:49,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:42:49,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:42:49,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:42:49,237 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:42:49,238 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:42:49,240 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:42:49,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:42:49,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:42:49,246 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:42:49,246 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:42:49,247 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:42:49,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:42:49,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:42:49,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:42:49,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:42:49,252 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:42:49,253 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:42:49,254 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:42:49,255 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:42:49,256 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:42:49,256 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:42:49,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:42:49,258 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:42:49,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:42:49,260 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:42:49,287 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:42:49,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:42:49,287 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:42:49,288 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:42:49,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:42:49,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:42:49,289 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:42:49,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:42:49,290 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:42:49,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:42:49,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:42:49,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:42:49,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:42:49,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:42:49,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:42:49,291 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:42:49,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:42:49,292 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:42:49,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:42:49,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:42:49,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:42:49,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:42:49,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:42:49,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:42:49,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:42:49,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:42:49,294 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:42:49,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:42:49,294 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:42:49,295 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:42:49,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:42:49,295 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:42:49,295 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 371b46898ac196d32c6a3ef4c51b315e7fba4a376d0f69ff343a10a3b7c63d98 [2021-11-09 09:42:49,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:42:49,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:42:49,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:42:49,578 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:42:49,579 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:42:49,580 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-fpi/s32if.c [2021-11-09 09:42:49,686 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/data/345e3fbcb/9800a6833bf349cda0465a660fbf0818/FLAG5ddb8b42c [2021-11-09 09:42:50,155 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:42:50,156 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/sv-benchmarks/c/array-fpi/s32if.c [2021-11-09 09:42:50,168 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/data/345e3fbcb/9800a6833bf349cda0465a660fbf0818/FLAG5ddb8b42c [2021-11-09 09:42:50,527 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/data/345e3fbcb/9800a6833bf349cda0465a660fbf0818 [2021-11-09 09:42:50,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:42:50,535 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:42:50,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:42:50,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:42:50,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:42:50,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:42:50" (1/1) ... [2021-11-09 09:42:50,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@465bc9cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:42:50, skipping insertion in model container [2021-11-09 09:42:50,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:42:50" (1/1) ... [2021-11-09 09:42:50,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:42:50,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:42:50,793 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/sv-benchmarks/c/array-fpi/s32if.c[588,601] [2021-11-09 09:42:50,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:42:50,850 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:42:50,869 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/sv-benchmarks/c/array-fpi/s32if.c[588,601] [2021-11-09 09:42:50,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:42:50,927 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:42:50,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:42:50 WrapperNode [2021-11-09 09:42:50,929 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:42:50,930 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:42:50,931 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:42:50,931 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:42:50,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:42:50" (1/1) ... [2021-11-09 09:42:50,964 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:42:50" (1/1) ... [2021-11-09 09:42:51,007 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:42:51,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:42:51,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:42:51,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:42:51,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:42:50" (1/1) ... [2021-11-09 09:42:51,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:42:50" (1/1) ... [2021-11-09 09:42:51,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:42:50" (1/1) ... [2021-11-09 09:42:51,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:42:50" (1/1) ... [2021-11-09 09:42:51,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:42:50" (1/1) ... [2021-11-09 09:42:51,057 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:42:50" (1/1) ... [2021-11-09 09:42:51,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:42:50" (1/1) ... [2021-11-09 09:42:51,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:42:51,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:42:51,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:42:51,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:42:51,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:42:50" (1/1) ... [2021-11-09 09:42:51,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:42:51,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:42:51,111 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:42:51,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:42:51,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:42:51,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:42:51,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 09:42:51,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 09:42:51,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:42:51,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:42:51,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 09:42:51,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:42:51,539 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:42:51,539 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-09 09:42:51,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:42:51 BoogieIcfgContainer [2021-11-09 09:42:51,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:42:51,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:42:51,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:42:51,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:42:51,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:42:50" (1/3) ... [2021-11-09 09:42:51,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ecb0922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:42:51, skipping insertion in model container [2021-11-09 09:42:51,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:42:50" (2/3) ... [2021-11-09 09:42:51,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ecb0922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:42:51, skipping insertion in model container [2021-11-09 09:42:51,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:42:51" (3/3) ... [2021-11-09 09:42:51,576 INFO L111 eAbstractionObserver]: Analyzing ICFG s32if.c [2021-11-09 09:42:51,581 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:42:51,582 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:42:51,633 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:42:51,641 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 09:42:51,641 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 09:42:51,660 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:42:51,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 09:42:51,666 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:42:51,667 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:42:51,668 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:42:51,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:42:51,676 INFO L85 PathProgramCache]: Analyzing trace with hash -845308063, now seen corresponding path program 1 times [2021-11-09 09:42:51,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:42:51,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043481569] [2021-11-09 09:42:51,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:42:51,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:42:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:42:51,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:42:51,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043481569] [2021-11-09 09:42:51,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043481569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:42:51,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:42:51,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:42:51,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954686180] [2021-11-09 09:42:51,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 09:42:51,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:42:51,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 09:42:51,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:42:51,878 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:42:51,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:42:51,894 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-11-09 09:42:51,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 09:42:51,896 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-09 09:42:51,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:42:51,905 INFO L225 Difference]: With dead ends: 42 [2021-11-09 09:42:51,906 INFO L226 Difference]: Without dead ends: 19 [2021-11-09 09:42:51,909 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:42:51,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-09 09:42:51,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-09 09:42:51,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:42:51,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-09 09:42:51,947 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2021-11-09 09:42:51,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:42:51,948 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-09 09:42:51,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:42:51,949 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-09 09:42:51,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 09:42:51,950 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:42:51,950 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:42:51,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:42:51,951 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:42:51,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:42:51,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1238662774, now seen corresponding path program 1 times [2021-11-09 09:42:51,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:42:51,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383044609] [2021-11-09 09:42:51,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:42:51,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:42:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:42:52,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:42:52,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383044609] [2021-11-09 09:42:52,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383044609] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:42:52,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:42:52,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:42:52,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911230005] [2021-11-09 09:42:52,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:42:52,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:42:52,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:42:52,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:42:52,064 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:42:52,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:42:52,188 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2021-11-09 09:42:52,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:42:52,189 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-09 09:42:52,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:42:52,191 INFO L225 Difference]: With dead ends: 39 [2021-11-09 09:42:52,191 INFO L226 Difference]: Without dead ends: 27 [2021-11-09 09:42:52,192 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:42:52,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-09 09:42:52,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2021-11-09 09:42:52,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:42:52,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-09 09:42:52,198 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2021-11-09 09:42:52,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:42:52,199 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-09 09:42:52,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:42:52,199 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-09 09:42:52,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 09:42:52,200 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:42:52,201 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:42:52,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:42:52,201 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:42:52,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:42:52,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1944018757, now seen corresponding path program 1 times [2021-11-09 09:42:52,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:42:52,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022739855] [2021-11-09 09:42:52,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:42:52,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:42:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:42:52,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:42:52,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022739855] [2021-11-09 09:42:52,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022739855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:42:52,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396889507] [2021-11-09 09:42:52,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:42:52,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:42:52,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:42:52,981 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:42:53,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:42:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:53,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 09:42:53,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:42:53,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:42:53,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 09:42:53,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-09 09:42:53,817 INFO L354 Elim1Store]: treesize reduction 34, result has 48.5 percent of original size [2021-11-09 09:42:53,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 66 [2021-11-09 09:42:54,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:42:54,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:42:54,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-09 09:42:54,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541602169] [2021-11-09 09:42:54,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:42:54,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:42:54,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:42:54,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:42:54,923 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:42:55,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:42:55,480 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2021-11-09 09:42:55,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 09:42:55,481 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-09 09:42:55,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:42:55,484 INFO L225 Difference]: With dead ends: 57 [2021-11-09 09:42:55,485 INFO L226 Difference]: Without dead ends: 53 [2021-11-09 09:42:55,486 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:42:55,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-09 09:42:55,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2021-11-09 09:42:55,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:42:55,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-11-09 09:42:55,496 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 21 [2021-11-09 09:42:55,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:42:55,497 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-11-09 09:42:55,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:42:55,498 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-11-09 09:42:55,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 09:42:55,499 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:42:55,499 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:42:55,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-09 09:42:55,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:42:55,721 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:42:55,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:42:55,722 INFO L85 PathProgramCache]: Analyzing trace with hash 2001277059, now seen corresponding path program 1 times [2021-11-09 09:42:55,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:42:55,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004101922] [2021-11-09 09:42:55,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:42:55,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:42:55,767 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:42:55,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [106461577] [2021-11-09 09:42:55,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:42:55,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:42:55,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:42:55,787 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:42:55,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:42:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:55,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 09:42:55,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:42:55,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:42:56,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 09:42:56,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:42:56,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:42:56,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004101922] [2021-11-09 09:42:56,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:42:56,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106461577] [2021-11-09 09:42:56,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106461577] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:42:56,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:42:56,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-09 09:42:56,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520869648] [2021-11-09 09:42:56,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:42:56,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:42:56,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:42:56,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:42:56,049 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:42:56,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:42:56,157 INFO L93 Difference]: Finished difference Result 69 states and 91 transitions. [2021-11-09 09:42:56,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:42:56,158 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-09 09:42:56,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:42:56,159 INFO L225 Difference]: With dead ends: 69 [2021-11-09 09:42:56,159 INFO L226 Difference]: Without dead ends: 57 [2021-11-09 09:42:56,160 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:42:56,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-09 09:42:56,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2021-11-09 09:42:56,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:42:56,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2021-11-09 09:42:56,168 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 21 [2021-11-09 09:42:56,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:42:56,168 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2021-11-09 09:42:56,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:42:56,168 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2021-11-09 09:42:56,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 09:42:56,169 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:42:56,169 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:42:56,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:42:56,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:42:56,385 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:42:56,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:42:56,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1592625659, now seen corresponding path program 1 times [2021-11-09 09:42:56,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:42:56,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774704662] [2021-11-09 09:42:56,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:42:56,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:42:56,414 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:42:56,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790450226] [2021-11-09 09:42:56,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:42:56,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:42:56,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:42:56,420 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:42:56,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:42:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:56,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 09:42:56,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:42:56,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:42:56,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 09:42:56,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:42:56,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:42:56,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774704662] [2021-11-09 09:42:56,694 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:42:56,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790450226] [2021-11-09 09:42:56,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790450226] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:42:56,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:42:56,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-09 09:42:56,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344067129] [2021-11-09 09:42:56,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:42:56,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:42:56,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:42:56,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:42:56,704 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:42:56,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:42:56,792 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2021-11-09 09:42:56,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:42:56,794 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-09 09:42:56,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:42:56,797 INFO L225 Difference]: With dead ends: 68 [2021-11-09 09:42:56,798 INFO L226 Difference]: Without dead ends: 47 [2021-11-09 09:42:56,799 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:42:56,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-09 09:42:56,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-09 09:42:56,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 46 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:42:56,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2021-11-09 09:42:56,816 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 21 [2021-11-09 09:42:56,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:42:56,817 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2021-11-09 09:42:56,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:42:56,818 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2021-11-09 09:42:56,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 09:42:56,820 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:42:56,820 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:42:56,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:42:57,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:42:57,037 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:42:57,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:42:57,038 INFO L85 PathProgramCache]: Analyzing trace with hash -823792505, now seen corresponding path program 2 times [2021-11-09 09:42:57,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:42:57,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471702142] [2021-11-09 09:42:57,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:42:57,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:42:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:57,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:42:57,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:42:57,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471702142] [2021-11-09 09:42:57,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471702142] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:42:57,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379276495] [2021-11-09 09:42:57,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:42:57,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:42:57,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:42:57,162 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:42:57,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:42:57,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:42:57,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:42:57,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:42:57,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:42:57,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:42:57,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379276495] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:42:57,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:42:57,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-11-09 09:42:57,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260198674] [2021-11-09 09:42:57,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:42:57,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:42:57,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:42:57,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:42:57,394 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:42:57,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:42:57,604 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2021-11-09 09:42:57,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:42:57,605 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-09 09:42:57,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:42:57,606 INFO L225 Difference]: With dead ends: 72 [2021-11-09 09:42:57,606 INFO L226 Difference]: Without dead ends: 62 [2021-11-09 09:42:57,607 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:42:57,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-09 09:42:57,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2021-11-09 09:42:57,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:42:57,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2021-11-09 09:42:57,615 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 23 [2021-11-09 09:42:57,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:42:57,615 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2021-11-09 09:42:57,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:42:57,615 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2021-11-09 09:42:57,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 09:42:57,616 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:42:57,617 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:42:57,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:42:57,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 09:42:57,821 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:42:57,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:42:57,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1832157868, now seen corresponding path program 3 times [2021-11-09 09:42:57,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:42:57,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041088905] [2021-11-09 09:42:57,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:42:57,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:42:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:42:57,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:42:57,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041088905] [2021-11-09 09:42:57,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041088905] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:42:57,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571496665] [2021-11-09 09:42:57,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:42:57,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:42:57,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:42:57,906 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:42:57,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:42:58,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:42:58,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:42:58,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:42:58,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:42:58,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:42:58,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571496665] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:42:58,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:42:58,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-11-09 09:42:58,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673840965] [2021-11-09 09:42:58,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:42:58,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:42:58,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:42:58,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:42:58,142 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:42:58,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:42:58,296 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2021-11-09 09:42:58,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:42:58,297 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-09 09:42:58,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:42:58,298 INFO L225 Difference]: With dead ends: 65 [2021-11-09 09:42:58,298 INFO L226 Difference]: Without dead ends: 35 [2021-11-09 09:42:58,299 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:42:58,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-09 09:42:58,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2021-11-09 09:42:58,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:42:58,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-11-09 09:42:58,310 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 24 [2021-11-09 09:42:58,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:42:58,311 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-11-09 09:42:58,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:42:58,311 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-11-09 09:42:58,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:42:58,312 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:42:58,312 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:42:58,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:42:58,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:42:58,529 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:42:58,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:42:58,530 INFO L85 PathProgramCache]: Analyzing trace with hash -14433298, now seen corresponding path program 4 times [2021-11-09 09:42:58,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:42:58,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622768216] [2021-11-09 09:42:58,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:42:58,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:42:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:42:59,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:42:59,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622768216] [2021-11-09 09:42:59,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622768216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:42:59,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011192844] [2021-11-09 09:42:59,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:42:59,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:42:59,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:42:59,326 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:42:59,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:42:59,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:42:59,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:42:59,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 09:42:59,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:42:59,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:42:59,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:42:59,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-09 09:42:59,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:42:59,638 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-09 09:42:59,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2021-11-09 09:42:59,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:42:59,987 INFO L354 Elim1Store]: treesize reduction 62, result has 44.1 percent of original size [2021-11-09 09:42:59,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 78 [2021-11-09 09:43:00,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:43:00,746 INFO L354 Elim1Store]: treesize reduction 122, result has 39.6 percent of original size [2021-11-09 09:43:00,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 97 treesize of output 141 [2021-11-09 09:43:02,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:43:02,740 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-09 09:43:02,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 73 [2021-11-09 09:43:02,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:43:02,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:43:02,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-09 09:43:02,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654657115] [2021-11-09 09:43:02,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:43:02,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:43:02,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:43:02,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:43:02,973 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:03,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:43:03,563 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2021-11-09 09:43:03,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:43:03,564 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-09 09:43:03,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:43:03,565 INFO L225 Difference]: With dead ends: 69 [2021-11-09 09:43:03,565 INFO L226 Difference]: Without dead ends: 65 [2021-11-09 09:43:03,566 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 09:43:03,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-09 09:43:03,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2021-11-09 09:43:03,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 52 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:03,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2021-11-09 09:43:03,574 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 29 [2021-11-09 09:43:03,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:43:03,574 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2021-11-09 09:43:03,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:03,574 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2021-11-09 09:43:03,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:43:03,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:43:03,584 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:43:03,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:43:03,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:43:03,793 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:43:03,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:43:03,794 INFO L85 PathProgramCache]: Analyzing trace with hash 42825004, now seen corresponding path program 1 times [2021-11-09 09:43:03,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:43:03,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436769685] [2021-11-09 09:43:03,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:43:03,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:43:03,824 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:43:03,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386510033] [2021-11-09 09:43:03,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:43:03,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:43:03,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:43:03,826 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:43:03,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:43:04,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:04,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:43:04,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:43:04,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 09:43:04,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-11-09 09:43:04,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:43:04,311 INFO L354 Elim1Store]: treesize reduction 100, result has 17.4 percent of original size [2021-11-09 09:43:04,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 37 [2021-11-09 09:43:04,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 09:43:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:43:04,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:43:04,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436769685] [2021-11-09 09:43:04,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:43:04,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386510033] [2021-11-09 09:43:04,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386510033] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:43:04,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:43:04,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-09 09:43:04,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425926518] [2021-11-09 09:43:04,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:43:04,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:43:04,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:43:04,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:43:04,441 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:04,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:43:04,654 INFO L93 Difference]: Finished difference Result 116 states and 151 transitions. [2021-11-09 09:43:04,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:43:04,655 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-09 09:43:04,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:43:04,656 INFO L225 Difference]: With dead ends: 116 [2021-11-09 09:43:04,656 INFO L226 Difference]: Without dead ends: 101 [2021-11-09 09:43:04,657 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:43:04,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-09 09:43:04,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2021-11-09 09:43:04,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.273972602739726) internal successors, (93), 73 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:04,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2021-11-09 09:43:04,689 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 29 [2021-11-09 09:43:04,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:43:04,692 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2021-11-09 09:43:04,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:04,692 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2021-11-09 09:43:04,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:43:04,693 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:43:04,693 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:43:04,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:43:04,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-09 09:43:04,894 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:43:04,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:43:04,895 INFO L85 PathProgramCache]: Analyzing trace with hash 665625072, now seen corresponding path program 2 times [2021-11-09 09:43:04,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:43:04,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101815662] [2021-11-09 09:43:04,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:43:04,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:43:04,909 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:43:04,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561876961] [2021-11-09 09:43:04,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:43:04,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:43:04,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:43:04,911 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:43:04,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:43:05,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:43:05,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:43:05,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:43:05,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:43:05,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2021-11-09 09:43:05,264 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-11-09 09:43:05,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 27 [2021-11-09 09:43:05,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 09:43:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 09:43:05,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:43:05,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101815662] [2021-11-09 09:43:05,337 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:43:05,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561876961] [2021-11-09 09:43:05,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561876961] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:43:05,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:43:05,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-09 09:43:05,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112312625] [2021-11-09 09:43:05,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:43:05,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:43:05,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:43:05,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:43:05,340 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:05,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:43:05,418 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2021-11-09 09:43:05,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:43:05,419 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-09 09:43:05,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:43:05,420 INFO L225 Difference]: With dead ends: 88 [2021-11-09 09:43:05,420 INFO L226 Difference]: Without dead ends: 65 [2021-11-09 09:43:05,421 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:43:05,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-09 09:43:05,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2021-11-09 09:43:05,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 61 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:05,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2021-11-09 09:43:05,428 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 29 [2021-11-09 09:43:05,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:43:05,428 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2021-11-09 09:43:05,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:05,429 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2021-11-09 09:43:05,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:43:05,430 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:43:05,430 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:43:05,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:43:05,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 09:43:05,649 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:43:05,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:43:05,650 INFO L85 PathProgramCache]: Analyzing trace with hash -968292246, now seen corresponding path program 1 times [2021-11-09 09:43:05,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:43:05,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765075957] [2021-11-09 09:43:05,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:43:05,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:43:05,665 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:43:05,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1921944911] [2021-11-09 09:43:05,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:43:05,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:43:05,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:43:05,667 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:43:05,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:43:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:05,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 09:43:05,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:43:05,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 09:43:05,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:43:05,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:43:05,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2021-11-09 09:43:06,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 09:43:06,076 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:43:06,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:43:06,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765075957] [2021-11-09 09:43:06,077 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:43:06,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921944911] [2021-11-09 09:43:06,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921944911] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:43:06,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:43:06,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-09 09:43:06,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982369310] [2021-11-09 09:43:06,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:43:06,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:43:06,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:43:06,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:43:06,080 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:06,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:43:06,181 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2021-11-09 09:43:06,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:43:06,182 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-09 09:43:06,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:43:06,183 INFO L225 Difference]: With dead ends: 86 [2021-11-09 09:43:06,183 INFO L226 Difference]: Without dead ends: 62 [2021-11-09 09:43:06,183 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:43:06,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-09 09:43:06,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-09 09:43:06,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:06,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-11-09 09:43:06,191 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 29 [2021-11-09 09:43:06,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:43:06,191 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-11-09 09:43:06,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:06,191 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-11-09 09:43:06,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 09:43:06,192 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:43:06,193 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:43:06,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:43:06,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 09:43:06,394 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:43:06,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:43:06,394 INFO L85 PathProgramCache]: Analyzing trace with hash -554569936, now seen corresponding path program 5 times [2021-11-09 09:43:06,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:43:06,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207563701] [2021-11-09 09:43:06,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:43:06,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:43:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:43:06,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:43:06,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207563701] [2021-11-09 09:43:06,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207563701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:43:06,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228841834] [2021-11-09 09:43:06,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:43:06,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:43:06,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:43:06,519 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:43:06,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 09:43:06,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 09:43:06,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:43:06,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 09:43:06,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:43:06,997 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:43:06,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228841834] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:43:06,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:43:06,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-09 09:43:06,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635081819] [2021-11-09 09:43:06,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 09:43:06,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:43:06,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 09:43:06,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:43:07,000 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:07,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:43:07,282 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2021-11-09 09:43:07,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:43:07,282 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-09 09:43:07,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:43:07,283 INFO L225 Difference]: With dead ends: 82 [2021-11-09 09:43:07,283 INFO L226 Difference]: Without dead ends: 69 [2021-11-09 09:43:07,284 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:43:07,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-09 09:43:07,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2021-11-09 09:43:07,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:07,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-11-09 09:43:07,291 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 31 [2021-11-09 09:43:07,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:43:07,291 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-11-09 09:43:07,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:07,291 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-11-09 09:43:07,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 09:43:07,292 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:43:07,292 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:43:07,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:43:07,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 09:43:07,501 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:43:07,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:43:07,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1053387787, now seen corresponding path program 6 times [2021-11-09 09:43:07,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:43:07,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106187229] [2021-11-09 09:43:07,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:43:07,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:43:07,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:43:07,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:43:07,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106187229] [2021-11-09 09:43:07,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106187229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:43:07,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039119441] [2021-11-09 09:43:07,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:43:07,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:43:07,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:43:07,606 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:43:07,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 09:43:07,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-09 09:43:07,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:43:07,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 09:43:07,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:43:08,057 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:43:08,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039119441] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:43:08,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:43:08,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-09 09:43:08,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401827061] [2021-11-09 09:43:08,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 09:43:08,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:43:08,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 09:43:08,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:43:08,061 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:08,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:43:08,233 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2021-11-09 09:43:08,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:43:08,234 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-09 09:43:08,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:43:08,235 INFO L225 Difference]: With dead ends: 77 [2021-11-09 09:43:08,235 INFO L226 Difference]: Without dead ends: 43 [2021-11-09 09:43:08,236 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:43:08,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-09 09:43:08,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-11-09 09:43:08,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:08,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-11-09 09:43:08,240 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 32 [2021-11-09 09:43:08,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:43:08,240 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-11-09 09:43:08,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:08,241 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-11-09 09:43:08,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 09:43:08,242 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:43:08,242 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:43:08,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 09:43:08,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:43:08,457 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:43:08,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:43:08,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1383779305, now seen corresponding path program 7 times [2021-11-09 09:43:08,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:43:08,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441209602] [2021-11-09 09:43:08,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:43:08,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:43:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:09,517 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 09:43:09,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:43:09,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441209602] [2021-11-09 09:43:09,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441209602] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:43:09,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415345649] [2021-11-09 09:43:09,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:43:09,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:43:09,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:43:09,519 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:43:09,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 09:43:09,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:09,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 09:43:09,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:43:09,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:43:09,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 09:43:09,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:43:09,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-09 09:43:09,974 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-09 09:43:09,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2021-11-09 09:43:10,124 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-09 09:43:10,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 52 [2021-11-09 09:43:10,484 INFO L354 Elim1Store]: treesize reduction 114, result has 39.4 percent of original size [2021-11-09 09:43:10,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 58 treesize of output 106 [2021-11-09 09:43:11,532 INFO L354 Elim1Store]: treesize reduction 188, result has 35.8 percent of original size [2021-11-09 09:43:11,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 130 treesize of output 185 [2021-11-09 09:43:16,201 INFO L354 Elim1Store]: treesize reduction 114, result has 39.4 percent of original size [2021-11-09 09:43:16,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 198 treesize of output 168 [2021-11-09 09:43:26,149 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:43:26,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:43:26,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-09 09:43:26,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023097572] [2021-11-09 09:43:26,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:43:26,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:43:26,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:43:26,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-11-09 09:43:26,152 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:27,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:43:27,123 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2021-11-09 09:43:27,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:43:27,124 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-09 09:43:27,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:43:27,125 INFO L225 Difference]: With dead ends: 68 [2021-11-09 09:43:27,125 INFO L226 Difference]: Without dead ends: 64 [2021-11-09 09:43:27,126 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 09:43:27,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-09 09:43:27,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2021-11-09 09:43:27,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:27,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2021-11-09 09:43:27,133 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 37 [2021-11-09 09:43:27,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:43:27,133 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2021-11-09 09:43:27,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:27,134 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2021-11-09 09:43:27,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 09:43:27,134 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:43:27,135 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:43:27,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 09:43:27,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:43:27,345 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:43:27,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:43:27,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1441037607, now seen corresponding path program 3 times [2021-11-09 09:43:27,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:43:27,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228725614] [2021-11-09 09:43:27,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:43:27,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:43:27,357 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:43:27,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108697737] [2021-11-09 09:43:27,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:43:27,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:43:27,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:43:27,358 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:43:27,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 09:43:27,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 09:43:27,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:43:27,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:43:27,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:43:28,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2021-11-09 09:43:28,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:43:28,235 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-09 09:43:28,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 43 [2021-11-09 09:43:28,339 INFO L354 Elim1Store]: treesize reduction 124, result has 15.6 percent of original size [2021-11-09 09:43:28,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 48 [2021-11-09 09:43:28,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:43:28,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-11-09 09:43:28,474 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 09:43:28,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:43:28,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228725614] [2021-11-09 09:43:28,475 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:43:28,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108697737] [2021-11-09 09:43:28,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108697737] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:43:28,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:43:28,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-09 09:43:28,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096458141] [2021-11-09 09:43:28,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:43:28,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:43:28,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:43:28,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:43:28,478 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:28,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:43:28,904 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2021-11-09 09:43:28,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:43:28,905 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-09 09:43:28,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:43:28,906 INFO L225 Difference]: With dead ends: 98 [2021-11-09 09:43:28,906 INFO L226 Difference]: Without dead ends: 94 [2021-11-09 09:43:28,907 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:43:28,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-09 09:43:28,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2021-11-09 09:43:28,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.2125) internal successors, (97), 80 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:28,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2021-11-09 09:43:28,922 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 37 [2021-11-09 09:43:28,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:43:28,926 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2021-11-09 09:43:28,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:28,926 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2021-11-09 09:43:28,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 09:43:28,927 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:43:28,927 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:43:28,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 09:43:29,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 09:43:29,133 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:43:29,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:43:29,133 INFO L85 PathProgramCache]: Analyzing trace with hash 2063837675, now seen corresponding path program 4 times [2021-11-09 09:43:29,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:43:29,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733680200] [2021-11-09 09:43:29,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:43:29,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:43:29,150 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:43:29,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795370355] [2021-11-09 09:43:29,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:43:29,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:43:29,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:43:29,152 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:43:29,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 09:43:29,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:43:29,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:43:29,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 09:43:29,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:43:29,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2021-11-09 09:43:29,853 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-11-09 09:43:29,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 29 [2021-11-09 09:43:29,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:43:30,000 INFO L354 Elim1Store]: treesize reduction 100, result has 17.4 percent of original size [2021-11-09 09:43:30,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 38 [2021-11-09 09:43:30,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 09:43:30,097 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 09:43:30,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:43:30,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733680200] [2021-11-09 09:43:30,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:43:30,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795370355] [2021-11-09 09:43:30,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795370355] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:43:30,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:43:30,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-09 09:43:30,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199533346] [2021-11-09 09:43:30,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 09:43:30,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:43:30,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 09:43:30,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:43:30,100 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:30,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:43:30,337 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2021-11-09 09:43:30,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:43:30,337 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-09 09:43:30,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:43:30,338 INFO L225 Difference]: With dead ends: 100 [2021-11-09 09:43:30,338 INFO L226 Difference]: Without dead ends: 86 [2021-11-09 09:43:30,339 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:43:30,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-09 09:43:30,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-11-09 09:43:30,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1686746987951808) internal successors, (97), 83 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:30,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2021-11-09 09:43:30,355 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 37 [2021-11-09 09:43:30,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:43:30,356 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2021-11-09 09:43:30,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:30,356 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2021-11-09 09:43:30,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 09:43:30,357 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:43:30,357 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:43:30,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 09:43:30,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 09:43:30,573 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:43:30,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:43:30,573 INFO L85 PathProgramCache]: Analyzing trace with hash -147310295, now seen corresponding path program 2 times [2021-11-09 09:43:30,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:43:30,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872503606] [2021-11-09 09:43:30,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:43:30,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:43:30,591 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:43:30,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207986870] [2021-11-09 09:43:30,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:43:30,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:43:30,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:43:30,593 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:43:30,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 09:43:31,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:43:31,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:43:31,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:43:31,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:43:31,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 09:43:31,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:43:31,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:43:31,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2021-11-09 09:43:31,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:43:31,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:43:31,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2021-11-09 09:43:31,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 09:43:31,330 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:43:31,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:43:31,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872503606] [2021-11-09 09:43:31,330 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:43:31,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207986870] [2021-11-09 09:43:31,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207986870] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:43:31,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:43:31,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-09 09:43:31,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907441105] [2021-11-09 09:43:31,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:43:31,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:43:31,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:43:31,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:43:31,333 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:31,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:43:31,519 INFO L93 Difference]: Finished difference Result 142 states and 168 transitions. [2021-11-09 09:43:31,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:43:31,520 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-09 09:43:31,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:43:31,521 INFO L225 Difference]: With dead ends: 142 [2021-11-09 09:43:31,521 INFO L226 Difference]: Without dead ends: 88 [2021-11-09 09:43:31,522 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:43:31,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-09 09:43:31,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2021-11-09 09:43:31,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1647058823529413) internal successors, (99), 85 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:31,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2021-11-09 09:43:31,535 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 37 [2021-11-09 09:43:31,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:43:31,535 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2021-11-09 09:43:31,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:31,536 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2021-11-09 09:43:31,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 09:43:31,536 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:43:31,537 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:43:31,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 09:43:31,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 09:43:31,753 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:43:31,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:43:31,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1016239403, now seen corresponding path program 8 times [2021-11-09 09:43:31,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:43:31,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138622894] [2021-11-09 09:43:31,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:43:31,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:43:31,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:31,870 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:43:31,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:43:31,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138622894] [2021-11-09 09:43:31,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138622894] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:43:31,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556008568] [2021-11-09 09:43:31,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:43:31,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:43:31,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:43:31,877 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:43:31,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 09:43:32,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:43:32,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:43:32,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 09:43:32,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:43:32,542 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:43:32,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556008568] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:43:32,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:43:32,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-11-09 09:43:32,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201925804] [2021-11-09 09:43:32,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 09:43:32,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:43:32,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 09:43:32,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:43:32,544 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:32,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:43:32,942 INFO L93 Difference]: Finished difference Result 136 states and 160 transitions. [2021-11-09 09:43:32,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 09:43:32,942 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-09 09:43:32,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:43:32,944 INFO L225 Difference]: With dead ends: 136 [2021-11-09 09:43:32,944 INFO L226 Difference]: Without dead ends: 121 [2021-11-09 09:43:32,945 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-11-09 09:43:32,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-09 09:43:32,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 71. [2021-11-09 09:43:32,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:32,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2021-11-09 09:43:32,956 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 39 [2021-11-09 09:43:32,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:43:32,956 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2021-11-09 09:43:32,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:32,957 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2021-11-09 09:43:32,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 09:43:32,957 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:43:32,958 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:43:33,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 09:43:33,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 09:43:33,173 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:43:33,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:43:33,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1682760144, now seen corresponding path program 9 times [2021-11-09 09:43:33,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:43:33,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783894036] [2021-11-09 09:43:33,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:43:33,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:43:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:33,283 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:43:33,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:43:33,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783894036] [2021-11-09 09:43:33,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783894036] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:43:33,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825781928] [2021-11-09 09:43:33,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:43:33,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:43:33,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:43:33,286 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:43:33,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 09:43:33,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 09:43:33,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:43:33,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 09:43:33,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:43:33,949 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:43:33,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825781928] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:43:33,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:43:33,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-11-09 09:43:33,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276406069] [2021-11-09 09:43:33,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 09:43:33,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:43:33,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 09:43:33,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:43:33,952 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:34,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:43:34,226 INFO L93 Difference]: Finished difference Result 132 states and 155 transitions. [2021-11-09 09:43:34,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:43:34,227 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-09 09:43:34,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:43:34,228 INFO L225 Difference]: With dead ends: 132 [2021-11-09 09:43:34,228 INFO L226 Difference]: Without dead ends: 73 [2021-11-09 09:43:34,228 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:43:34,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-09 09:43:34,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2021-11-09 09:43:34,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 61 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:34,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-11-09 09:43:34,238 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 40 [2021-11-09 09:43:34,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:43:34,238 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-11-09 09:43:34,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:43:34,239 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-11-09 09:43:34,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 09:43:34,239 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:43:34,240 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:43:34,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 09:43:34,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:43:34,457 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:43:34,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:43:34,457 INFO L85 PathProgramCache]: Analyzing trace with hash -2111860654, now seen corresponding path program 10 times [2021-11-09 09:43:34,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:43:34,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386968214] [2021-11-09 09:43:34,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:43:34,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:43:34,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:35,372 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 09:43:35,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:43:35,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386968214] [2021-11-09 09:43:35,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386968214] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:43:35,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964099956] [2021-11-09 09:43:35,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:43:35,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:43:35,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:43:35,381 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:43:35,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 09:43:35,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:43:35,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:43:35,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 09:43:35,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:43:35,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:43:35,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:43:35,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-09 09:43:36,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:43:36,100 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 09:43:36,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-09 09:43:36,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:43:36,274 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-09 09:43:36,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2021-11-09 09:43:36,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:43:36,544 INFO L354 Elim1Store]: treesize reduction 131, result has 18.1 percent of original size [2021-11-09 09:43:36,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 59 [2021-11-09 09:43:36,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:43:37,033 INFO L354 Elim1Store]: treesize reduction 178, result has 35.7 percent of original size [2021-11-09 09:43:37,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 67 treesize of output 134 [2021-11-09 09:43:38,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:43:38,693 INFO L354 Elim1Store]: treesize reduction 266, result has 32.8 percent of original size [2021-11-09 09:43:38,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 163 treesize of output 229 [2021-11-09 09:43:43,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:43:44,050 INFO L354 Elim1Store]: treesize reduction 178, result has 35.7 percent of original size [2021-11-09 09:43:44,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 389 treesize of output 266 [2021-11-09 09:44:05,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:44:05,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:44:05,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-09 09:44:05,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668553009] [2021-11-09 09:44:05,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:44:05,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:44:05,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:44:05,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 09:44:05,122 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:06,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:44:06,342 INFO L93 Difference]: Finished difference Result 118 states and 139 transitions. [2021-11-09 09:44:06,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 09:44:06,343 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 09:44:06,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:44:06,343 INFO L225 Difference]: With dead ends: 118 [2021-11-09 09:44:06,344 INFO L226 Difference]: Without dead ends: 114 [2021-11-09 09:44:06,345 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=240, Invalid=2310, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 09:44:06,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-09 09:44:06,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 101. [2021-11-09 09:44:06,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.17) internal successors, (117), 100 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:06,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 117 transitions. [2021-11-09 09:44:06,358 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 117 transitions. Word has length 45 [2021-11-09 09:44:06,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:44:06,358 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 117 transitions. [2021-11-09 09:44:06,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:06,359 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 117 transitions. [2021-11-09 09:44:06,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 09:44:06,359 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:44:06,360 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:06,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 09:44:06,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:06,581 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:44:06,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:06,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1431802284, now seen corresponding path program 5 times [2021-11-09 09:44:06,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:06,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558346353] [2021-11-09 09:44:06,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:06,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:06,606 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:44:06,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676935709] [2021-11-09 09:44:06,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:44:06,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:06,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:44:06,613 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:44:06,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 09:44:07,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 09:44:07,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:44:07,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 09:44:07,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:44:07,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 09:44:07,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2021-11-09 09:44:07,553 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-11-09 09:44:07,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 29 [2021-11-09 09:44:07,632 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-09 09:44:07,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2021-11-09 09:44:07,701 INFO L354 Elim1Store]: treesize reduction 114, result has 15.6 percent of original size [2021-11-09 09:44:07,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 37 [2021-11-09 09:44:07,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-09 09:44:07,772 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 09:44:07,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:44:07,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558346353] [2021-11-09 09:44:07,772 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:44:07,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676935709] [2021-11-09 09:44:07,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676935709] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:07,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:44:07,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-09 09:44:07,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882957822] [2021-11-09 09:44:07,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:44:07,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:44:07,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:44:07,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:44:07,774 INFO L87 Difference]: Start difference. First operand 101 states and 117 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:07,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:44:07,997 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2021-11-09 09:44:07,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:44:07,998 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 09:44:07,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:44:07,999 INFO L225 Difference]: With dead ends: 120 [2021-11-09 09:44:07,999 INFO L226 Difference]: Without dead ends: 106 [2021-11-09 09:44:07,999 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:44:08,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-09 09:44:08,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-11-09 09:44:08,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 103 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:08,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2021-11-09 09:44:08,012 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 45 [2021-11-09 09:44:08,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:44:08,013 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2021-11-09 09:44:08,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:08,013 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2021-11-09 09:44:08,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 09:44:08,014 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:44:08,014 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:08,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 09:44:08,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-09 09:44:08,221 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:44:08,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:08,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1422716494, now seen corresponding path program 3 times [2021-11-09 09:44:08,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:08,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538676616] [2021-11-09 09:44:08,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:08,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:08,236 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:44:08,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194884939] [2021-11-09 09:44:08,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:44:08,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:08,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:44:08,244 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:44:08,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 09:44:08,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 09:44:08,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:44:08,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 09:44:08,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:44:08,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 09:44:09,104 INFO L354 Elim1Store]: treesize reduction 55, result has 16.7 percent of original size [2021-11-09 09:44:09,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 36 [2021-11-09 09:44:09,202 INFO L354 Elim1Store]: treesize reduction 34, result has 48.5 percent of original size [2021-11-09 09:44:09,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 59 [2021-11-09 09:44:09,436 INFO L354 Elim1Store]: treesize reduction 34, result has 48.5 percent of original size [2021-11-09 09:44:09,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 64 [2021-11-09 09:44:09,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:44:09,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 54 [2021-11-09 09:44:10,250 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:44:10,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:44:10,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538676616] [2021-11-09 09:44:10,251 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:44:10,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194884939] [2021-11-09 09:44:10,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194884939] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:10,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:44:10,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-09 09:44:10,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148289489] [2021-11-09 09:44:10,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:44:10,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:44:10,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:44:10,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:44:10,254 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:11,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:44:11,224 INFO L93 Difference]: Finished difference Result 146 states and 167 transitions. [2021-11-09 09:44:11,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 09:44:11,226 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 09:44:11,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:44:11,227 INFO L225 Difference]: With dead ends: 146 [2021-11-09 09:44:11,227 INFO L226 Difference]: Without dead ends: 116 [2021-11-09 09:44:11,228 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=270, Invalid=1136, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 09:44:11,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-09 09:44:11,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2021-11-09 09:44:11,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1592920353982301) internal successors, (131), 113 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:11,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2021-11-09 09:44:11,240 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 45 [2021-11-09 09:44:11,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:44:11,240 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2021-11-09 09:44:11,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:11,240 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2021-11-09 09:44:11,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 09:44:11,241 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:44:11,241 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:11,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 09:44:11,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:11,442 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:44:11,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:11,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1510143892, now seen corresponding path program 11 times [2021-11-09 09:44:11,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:11,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071502588] [2021-11-09 09:44:11,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:11,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:11,584 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 9 proven. 38 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 09:44:11,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:44:11,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071502588] [2021-11-09 09:44:11,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071502588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:11,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761407581] [2021-11-09 09:44:11,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:44:11,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:11,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:44:11,586 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:44:11,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 09:44:12,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 09:44:12,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:44:12,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:44:12,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:44:12,587 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 09:44:12,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761407581] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:12,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:44:12,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-11-09 09:44:12,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468530791] [2021-11-09 09:44:12,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:44:12,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:44:12,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:44:12,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:44:12,590 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:12,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:44:12,992 INFO L93 Difference]: Finished difference Result 179 states and 210 transitions. [2021-11-09 09:44:12,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:44:12,992 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-09 09:44:12,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:44:12,994 INFO L225 Difference]: With dead ends: 179 [2021-11-09 09:44:12,994 INFO L226 Difference]: Without dead ends: 161 [2021-11-09 09:44:12,994 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2021-11-09 09:44:12,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-09 09:44:13,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 87. [2021-11-09 09:44:13,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1627906976744187) internal successors, (100), 86 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:13,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2021-11-09 09:44:13,005 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 47 [2021-11-09 09:44:13,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:44:13,005 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2021-11-09 09:44:13,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:13,005 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2021-11-09 09:44:13,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 09:44:13,006 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:44:13,006 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:13,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 09:44:13,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:13,209 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:44:13,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:13,209 INFO L85 PathProgramCache]: Analyzing trace with hash -220752601, now seen corresponding path program 12 times [2021-11-09 09:44:13,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:13,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788183058] [2021-11-09 09:44:13,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:13,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 09:44:13,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:44:13,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788183058] [2021-11-09 09:44:13,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788183058] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:13,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693406101] [2021-11-09 09:44:13,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:44:13,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:13,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:44:13,361 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:44:13,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 09:44:14,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-09 09:44:14,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:44:14,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:44:14,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:44:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 09:44:14,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693406101] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:14,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:44:14,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-11-09 09:44:14,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420139774] [2021-11-09 09:44:14,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:44:14,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:44:14,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:44:14,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:44:14,473 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:14,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:44:14,742 INFO L93 Difference]: Finished difference Result 172 states and 202 transitions. [2021-11-09 09:44:14,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 09:44:14,743 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-09 09:44:14,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:44:14,744 INFO L225 Difference]: With dead ends: 172 [2021-11-09 09:44:14,744 INFO L226 Difference]: Without dead ends: 94 [2021-11-09 09:44:14,745 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-11-09 09:44:14,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-09 09:44:14,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 78. [2021-11-09 09:44:14,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1688311688311688) internal successors, (90), 77 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:14,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2021-11-09 09:44:14,756 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 48 [2021-11-09 09:44:14,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:44:14,756 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2021-11-09 09:44:14,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:14,756 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2021-11-09 09:44:14,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 09:44:14,757 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:44:14,757 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:14,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 09:44:14,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 09:44:14,969 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:44:14,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:14,969 INFO L85 PathProgramCache]: Analyzing trace with hash 663114381, now seen corresponding path program 13 times [2021-11-09 09:44:14,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:14,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211219775] [2021-11-09 09:44:14,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:14,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:15,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-09 09:44:15,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:44:15,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211219775] [2021-11-09 09:44:15,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211219775] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:15,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043839057] [2021-11-09 09:44:15,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:44:15,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:15,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:44:15,992 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:44:15,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 09:44:16,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:16,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-09 09:44:16,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:44:16,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 09:44:16,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:44:16,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:44:16,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-09 09:44:16,833 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-09 09:44:16,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2021-11-09 09:44:17,019 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-09 09:44:17,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 52 [2021-11-09 09:44:17,281 INFO L354 Elim1Store]: treesize reduction 171, result has 17.8 percent of original size [2021-11-09 09:44:17,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 67 [2021-11-09 09:44:17,689 INFO L354 Elim1Store]: treesize reduction 180, result has 16.3 percent of original size [2021-11-09 09:44:17,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2021-11-09 09:44:18,765 INFO L354 Elim1Store]: treesize reduction 254, result has 32.8 percent of original size [2021-11-09 09:44:18,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 76 treesize of output 162 [2021-11-09 09:44:23,305 INFO L354 Elim1Store]: treesize reduction 356, result has 30.3 percent of original size [2021-11-09 09:44:23,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 27 case distinctions, treesize of input 196 treesize of output 273 [2021-11-09 09:44:46,887 INFO L354 Elim1Store]: treesize reduction 254, result has 32.8 percent of original size [2021-11-09 09:44:46,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 732 treesize of output 424 [2021-11-09 09:47:17,060 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:47:17,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:47:17,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-09 09:47:17,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480671192] [2021-11-09 09:47:17,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 09:47:17,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:17,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 09:47:17,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1492, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 09:47:17,062 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:18,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:18,983 INFO L93 Difference]: Finished difference Result 153 states and 181 transitions. [2021-11-09 09:47:18,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 09:47:18,983 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-09 09:47:18,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:18,985 INFO L225 Difference]: With dead ends: 153 [2021-11-09 09:47:18,986 INFO L226 Difference]: Without dead ends: 149 [2021-11-09 09:47:18,987 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 18 SyntacticMatches, 10 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=322, Invalid=3338, Unknown=0, NotChecked=0, Total=3660 [2021-11-09 09:47:18,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-09 09:47:18,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 131. [2021-11-09 09:47:19,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.176923076923077) internal successors, (153), 130 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:19,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 153 transitions. [2021-11-09 09:47:19,001 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 153 transitions. Word has length 53 [2021-11-09 09:47:19,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:19,001 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 153 transitions. [2021-11-09 09:47:19,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:19,001 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 153 transitions. [2021-11-09 09:47:19,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 09:47:19,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:19,002 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:47:19,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 09:47:19,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 09:47:19,202 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:19,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:19,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1343172751, now seen corresponding path program 6 times [2021-11-09 09:47:19,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:19,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387713568] [2021-11-09 09:47:19,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:19,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:19,218 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:47:19,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317765462] [2021-11-09 09:47:19,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:47:19,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:19,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:47:19,221 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:47:19,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 09:47:20,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-09 09:47:20,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:47:20,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 09:47:20,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:47:20,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2021-11-09 09:47:20,445 INFO L354 Elim1Store]: treesize reduction 59, result has 16.9 percent of original size [2021-11-09 09:47:20,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 29 [2021-11-09 09:47:20,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:47:20,647 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-09 09:47:20,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 44 [2021-11-09 09:47:20,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:47:20,731 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-09 09:47:20,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 44 [2021-11-09 09:47:20,831 INFO L354 Elim1Store]: treesize reduction 129, result has 15.7 percent of original size [2021-11-09 09:47:20,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 49 [2021-11-09 09:47:20,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:47:20,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2021-11-09 09:47:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-09 09:47:21,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:21,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387713568] [2021-11-09 09:47:21,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:47:21,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317765462] [2021-11-09 09:47:21,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317765462] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:21,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:47:21,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-09 09:47:21,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037424366] [2021-11-09 09:47:21,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:47:21,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:21,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:47:21,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:47:21,043 INFO L87 Difference]: Start difference. First operand 131 states and 153 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:22,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:22,596 INFO L93 Difference]: Finished difference Result 230 states and 273 transitions. [2021-11-09 09:47:22,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 09:47:22,597 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-09 09:47:22,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:22,598 INFO L225 Difference]: With dead ends: 230 [2021-11-09 09:47:22,598 INFO L226 Difference]: Without dead ends: 226 [2021-11-09 09:47:22,599 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=242, Invalid=948, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 09:47:22,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-09 09:47:22,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 204. [2021-11-09 09:47:22,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.1921182266009853) internal successors, (242), 203 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:22,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 242 transitions. [2021-11-09 09:47:22,632 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 242 transitions. Word has length 53 [2021-11-09 09:47:22,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:22,632 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 242 transitions. [2021-11-09 09:47:22,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:22,633 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 242 transitions. [2021-11-09 09:47:22,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 09:47:22,633 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:22,634 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:47:22,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 09:47:22,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 09:47:22,857 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:22,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:22,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1405212365, now seen corresponding path program 4 times [2021-11-09 09:47:22,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:22,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152524805] [2021-11-09 09:47:22,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:22,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:22,872 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:47:22,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30114979] [2021-11-09 09:47:22,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:47:22,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:22,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:47:22,874 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:47:22,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 09:47:23,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:47:23,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:47:23,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 09:47:23,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:47:23,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 09:47:24,033 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-09 09:47:24,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-09 09:47:24,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:24,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152524805] [2021-11-09 09:47:24,115 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:47:24,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30114979] [2021-11-09 09:47:24,115 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:47:24,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:47:24,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-09 09:47:24,115 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-09 09:47:24,115 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-11-09 09:47:24,121 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 09:47:24,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 09:47:24,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 09:47:24,332 INFO L731 BasicCegarLoop]: Path program histogram: [13, 6, 4, 1, 1, 1, 1] [2021-11-09 09:47:24,334 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-09 09:47:24,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 09:47:24 BoogieIcfgContainer [2021-11-09 09:47:24,359 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-09 09:47:24,359 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-09 09:47:24,359 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-09 09:47:24,360 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-09 09:47:24,360 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:42:51" (3/4) ... [2021-11-09 09:47:24,363 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-09 09:47:24,363 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-09 09:47:24,364 INFO L168 Benchmark]: Toolchain (without parser) took 273828.78 ms. Allocated memory was 113.2 MB in the beginning and 323.0 MB in the end (delta: 209.7 MB). Free memory was 81.3 MB in the beginning and 218.3 MB in the end (delta: -137.0 MB). Peak memory consumption was 72.4 MB. Max. memory is 16.1 GB. [2021-11-09 09:47:24,364 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 77.6 MB. Free memory was 34.8 MB in the beginning and 34.8 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 09:47:24,364 INFO L168 Benchmark]: CACSL2BoogieTranslator took 391.27 ms. Allocated memory is still 113.2 MB. Free memory was 81.1 MB in the beginning and 89.6 MB in the end (delta: -8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-09 09:47:24,365 INFO L168 Benchmark]: Boogie Procedure Inliner took 76.80 ms. Allocated memory is still 113.2 MB. Free memory was 89.6 MB in the beginning and 87.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 09:47:24,365 INFO L168 Benchmark]: Boogie Preprocessor took 59.22 ms. Allocated memory is still 113.2 MB. Free memory was 87.6 MB in the beginning and 86.7 MB in the end (delta: 889.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 09:47:24,365 INFO L168 Benchmark]: RCFGBuilder took 486.85 ms. Allocated memory is still 113.2 MB. Free memory was 86.7 MB in the beginning and 75.0 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-09 09:47:24,366 INFO L168 Benchmark]: TraceAbstraction took 272802.15 ms. Allocated memory was 113.2 MB in the beginning and 323.0 MB in the end (delta: 209.7 MB). Free memory was 74.7 MB in the beginning and 219.3 MB in the end (delta: -144.6 MB). Peak memory consumption was 69.3 MB. Max. memory is 16.1 GB. [2021-11-09 09:47:24,366 INFO L168 Benchmark]: Witness Printer took 3.55 ms. Allocated memory is still 323.0 MB. Free memory was 219.3 MB in the beginning and 218.3 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 09:47:24,368 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 77.6 MB. Free memory was 34.8 MB in the beginning and 34.8 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 391.27 ms. Allocated memory is still 113.2 MB. Free memory was 81.1 MB in the beginning and 89.6 MB in the end (delta: -8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 76.80 ms. Allocated memory is still 113.2 MB. Free memory was 89.6 MB in the beginning and 87.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 59.22 ms. Allocated memory is still 113.2 MB. Free memory was 87.6 MB in the beginning and 86.7 MB in the end (delta: 889.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 486.85 ms. Allocated memory is still 113.2 MB. Free memory was 86.7 MB in the beginning and 75.0 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 272802.15 ms. Allocated memory was 113.2 MB in the beginning and 323.0 MB in the end (delta: 209.7 MB). Free memory was 74.7 MB in the beginning and 219.3 MB in the end (delta: -144.6 MB). Peak memory consumption was 69.3 MB. Max. memory is 16.1 GB. * Witness Printer took 3.55 ms. Allocated memory is still 323.0 MB. Free memory was 219.3 MB in the beginning and 218.3 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 0 [L32] i=0 [L32] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 371b46898ac196d32c6a3ef4c51b315e7fba4a376d0f69ff343a10a3b7c63d98 [2021-11-09 09:47:27,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:47:27,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:47:27,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:47:27,390 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:47:27,393 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:47:27,394 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-fpi/s32if.c [2021-11-09 09:47:27,457 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/data/26589e6bf/798b3037d9e4448d9e1b4632ee84885f/FLAGe51b21803 [2021-11-09 09:47:28,038 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:47:28,039 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/sv-benchmarks/c/array-fpi/s32if.c [2021-11-09 09:47:28,049 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/data/26589e6bf/798b3037d9e4448d9e1b4632ee84885f/FLAGe51b21803 [2021-11-09 09:47:28,405 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/data/26589e6bf/798b3037d9e4448d9e1b4632ee84885f [2021-11-09 09:47:28,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:47:28,409 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:47:28,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:47:28,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:47:28,415 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:47:28,416 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:47:28" (1/1) ... [2021-11-09 09:47:28,417 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48758c22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:47:28, skipping insertion in model container [2021-11-09 09:47:28,417 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:47:28" (1/1) ... [2021-11-09 09:47:28,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:47:28,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:47:28,579 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/sv-benchmarks/c/array-fpi/s32if.c[588,601] [2021-11-09 09:47:28,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:47:28,617 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:47:28,629 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/sv-benchmarks/c/array-fpi/s32if.c[588,601] [2021-11-09 09:47:28,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:47:28,698 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:47:28,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:47:28 WrapperNode [2021-11-09 09:47:28,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:47:28,699 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:47:28,700 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:47:28,700 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:47:28,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:47:28" (1/1) ... [2021-11-09 09:47:28,716 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:47:28" (1/1) ... [2021-11-09 09:47:28,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:47:28,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:47:28,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:47:28,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:47:28,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:47:28" (1/1) ... [2021-11-09 09:47:28,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:47:28" (1/1) ... [2021-11-09 09:47:28,751 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:47:28" (1/1) ... [2021-11-09 09:47:28,752 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:47:28" (1/1) ... [2021-11-09 09:47:28,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:47:28" (1/1) ... [2021-11-09 09:47:28,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:47:28" (1/1) ... [2021-11-09 09:47:28,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:47:28" (1/1) ... [2021-11-09 09:47:28,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:47:28,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:47:28,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:47:28,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:47:28,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:47:28" (1/1) ... [2021-11-09 09:47:28,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:47:28,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:47:28,802 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:47:28,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:47:28,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-09 09:47:28,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:47:28,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-09 09:47:28,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 09:47:28,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-09 09:47:28,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:47:28,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:47:28,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-09 09:47:28,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:47:28,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-09 09:47:29,295 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:47:29,295 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-09 09:47:29,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:47:29 BoogieIcfgContainer [2021-11-09 09:47:29,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:47:29,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:47:29,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:47:29,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:47:29,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:47:28" (1/3) ... [2021-11-09 09:47:29,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634ea5cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:47:29, skipping insertion in model container [2021-11-09 09:47:29,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:47:28" (2/3) ... [2021-11-09 09:47:29,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634ea5cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:47:29, skipping insertion in model container [2021-11-09 09:47:29,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:47:29" (3/3) ... [2021-11-09 09:47:29,305 INFO L111 eAbstractionObserver]: Analyzing ICFG s32if.c [2021-11-09 09:47:29,310 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:47:29,311 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:47:29,396 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:47:29,406 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 09:47:29,407 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 09:47:29,433 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:29,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 09:47:29,445 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:29,445 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:47:29,446 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:29,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:29,452 INFO L85 PathProgramCache]: Analyzing trace with hash -845308063, now seen corresponding path program 1 times [2021-11-09 09:47:29,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:47:29,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413378870] [2021-11-09 09:47:29,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:29,466 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:47:29,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:47:29,469 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:47:29,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-09 09:47:29,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:29,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-09 09:47:29,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:47:29,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:29,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:47:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:29,710 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:47:29,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413378870] [2021-11-09 09:47:29,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413378870] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:47:29,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:47:29,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-09 09:47:29,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066439524] [2021-11-09 09:47:29,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 09:47:29,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:47:29,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 09:47:29,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:47:29,740 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:29,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:29,755 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-11-09 09:47:29,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 09:47:29,757 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-09 09:47:29,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:29,765 INFO L225 Difference]: With dead ends: 42 [2021-11-09 09:47:29,765 INFO L226 Difference]: Without dead ends: 19 [2021-11-09 09:47:29,768 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:47:29,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-09 09:47:29,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-09 09:47:29,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:29,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-09 09:47:29,799 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2021-11-09 09:47:29,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:29,800 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-09 09:47:29,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:29,800 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-09 09:47:29,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 09:47:29,801 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:29,801 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:47:29,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:47:30,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:47:30,013 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:30,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:30,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1238662774, now seen corresponding path program 1 times [2021-11-09 09:47:30,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:47:30,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [906439292] [2021-11-09 09:47:30,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:30,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:47:30,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:47:30,016 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:47:30,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-09 09:47:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:30,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:47:30,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:47:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:30,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:47:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:30,526 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:47:30,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [906439292] [2021-11-09 09:47:30,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [906439292] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:47:30,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:47:30,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-09 09:47:30,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890763162] [2021-11-09 09:47:30,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:47:30,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:47:30,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:47:30,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:47:30,531 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:31,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:31,081 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2021-11-09 09:47:31,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:47:31,082 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-09 09:47:31,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:31,083 INFO L225 Difference]: With dead ends: 39 [2021-11-09 09:47:31,083 INFO L226 Difference]: Without dead ends: 27 [2021-11-09 09:47:31,084 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:47:31,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-09 09:47:31,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2021-11-09 09:47:31,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:31,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-09 09:47:31,090 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2021-11-09 09:47:31,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:31,090 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-09 09:47:31,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:31,090 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-09 09:47:31,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 09:47:31,091 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:31,091 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:47:31,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:47:31,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:47:31,297 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:31,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:31,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1944018757, now seen corresponding path program 1 times [2021-11-09 09:47:31,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:47:31,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [800215584] [2021-11-09 09:47:31,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:31,299 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:47:31,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:47:31,304 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:47:31,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-09 09:47:31,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:31,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:47:31,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:47:31,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-11-09 09:47:31,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:47:31,664 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-11-09 09:47:31,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-09 09:47:31,778 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-09 09:47:31,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2021-11-09 09:47:32,286 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-09 09:47:32,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 36 [2021-11-09 09:47:32,729 INFO L354 Elim1Store]: treesize reduction 134, result has 13.5 percent of original size [2021-11-09 09:47:32,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 50 [2021-11-09 09:47:33,062 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-09 09:47:33,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 62 [2021-11-09 09:47:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:33,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:47:41,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:47:41,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:47:41,167 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 09:47:41,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 779 treesize of output 501 [2021-11-09 09:47:41,188 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 09:47:41,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 501 treesize of output 479 [2021-11-09 09:47:41,211 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-09 09:47:41,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 631 treesize of output 625 [2021-11-09 09:47:41,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 617 treesize of output 615 [2021-11-09 09:47:41,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 611 treesize of output 609 [2021-11-09 09:47:41,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:41,812 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:47:41,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [800215584] [2021-11-09 09:47:41,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [800215584] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:47:41,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:47:41,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-11-09 09:47:41,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576837499] [2021-11-09 09:47:41,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 09:47:41,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:47:41,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 09:47:41,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=447, Unknown=2, NotChecked=0, Total=552 [2021-11-09 09:47:41,816 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:11,734 WARN L207 SmtUtils]: Spent 18.02 s on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-11-09 09:48:28,955 WARN L207 SmtUtils]: Spent 13.64 s on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-11-09 09:48:31,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:31,123 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2021-11-09 09:48:31,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:48:31,125 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-09 09:48:31,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:31,135 INFO L225 Difference]: With dead ends: 76 [2021-11-09 09:48:31,135 INFO L226 Difference]: Without dead ends: 65 [2021-11-09 09:48:31,137 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 47.9s TimeCoverageRelationStatistics Valid=330, Invalid=1388, Unknown=4, NotChecked=0, Total=1722 [2021-11-09 09:48:31,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-09 09:48:31,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2021-11-09 09:48:31,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:31,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2021-11-09 09:48:31,151 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 21 [2021-11-09 09:48:31,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:31,151 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2021-11-09 09:48:31,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:31,152 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2021-11-09 09:48:31,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 09:48:31,153 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:31,153 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:31,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:48:31,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:48:31,367 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:31,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:31,368 INFO L85 PathProgramCache]: Analyzing trace with hash 2001277059, now seen corresponding path program 1 times [2021-11-09 09:48:31,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:48:31,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042680949] [2021-11-09 09:48:31,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:31,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:48:31,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:48:31,370 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:48:31,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-09 09:48:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:31,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:48:31,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:31,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:48:31,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:48:31,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 09:48:31,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:48:31,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:48:31,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-09 09:48:31,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-09 09:48:31,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:48:31,976 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:48:31,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042680949] [2021-11-09 09:48:31,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042680949] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:48:31,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:48:31,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-09 09:48:31,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184332271] [2021-11-09 09:48:31,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:48:31,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:48:31,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:48:31,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:48:31,978 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:32,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:32,892 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2021-11-09 09:48:32,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:48:32,893 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-09 09:48:32,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:32,895 INFO L225 Difference]: With dead ends: 63 [2021-11-09 09:48:32,895 INFO L226 Difference]: Without dead ends: 51 [2021-11-09 09:48:32,896 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:48:32,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-09 09:48:32,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2021-11-09 09:48:32,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:32,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2021-11-09 09:48:32,906 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 21 [2021-11-09 09:48:32,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:32,906 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2021-11-09 09:48:32,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:32,907 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2021-11-09 09:48:32,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 09:48:32,908 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:32,908 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:32,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:48:33,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:48:33,117 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:33,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:33,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1649883961, now seen corresponding path program 1 times [2021-11-09 09:48:33,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:48:33,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470586152] [2021-11-09 09:48:33,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:33,119 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:48:33,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:48:33,120 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:48:33,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-09 09:48:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:33,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 09:48:33,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:33,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:48:33,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 09:48:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:48:33,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:48:33,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-09 09:48:33,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-09 09:48:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:48:33,544 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:48:33,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470586152] [2021-11-09 09:48:33,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470586152] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:48:33,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:48:33,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-09 09:48:33,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336880384] [2021-11-09 09:48:33,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:48:33,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:48:33,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:48:33,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:48:33,546 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:34,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:34,187 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2021-11-09 09:48:34,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:48:34,196 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-09 09:48:34,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:34,197 INFO L225 Difference]: With dead ends: 60 [2021-11-09 09:48:34,197 INFO L226 Difference]: Without dead ends: 48 [2021-11-09 09:48:34,198 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:48:34,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-09 09:48:34,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2021-11-09 09:48:34,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:34,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2021-11-09 09:48:34,205 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 21 [2021-11-09 09:48:34,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:34,206 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2021-11-09 09:48:34,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:34,206 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2021-11-09 09:48:34,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 09:48:34,207 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:34,208 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:34,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:48:34,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:48:34,420 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:34,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:34,421 INFO L85 PathProgramCache]: Analyzing trace with hash -823792505, now seen corresponding path program 2 times [2021-11-09 09:48:34,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:48:34,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404720620] [2021-11-09 09:48:34,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:48:34,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:48:34,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:48:34,425 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:48:34,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-09 09:48:34,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:48:34,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:48:34,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:48:34,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:48:35,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:48:35,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:48:35,452 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:48:35,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404720620] [2021-11-09 09:48:35,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404720620] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:48:35,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:48:35,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-11-09 09:48:35,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353494544] [2021-11-09 09:48:35,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:48:35,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:48:35,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:48:35,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:48:35,455 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:37,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:37,444 INFO L93 Difference]: Finished difference Result 91 states and 116 transitions. [2021-11-09 09:48:37,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 09:48:37,445 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-09 09:48:37,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:37,446 INFO L225 Difference]: With dead ends: 91 [2021-11-09 09:48:37,446 INFO L226 Difference]: Without dead ends: 76 [2021-11-09 09:48:37,447 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2021-11-09 09:48:37,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-09 09:48:37,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2021-11-09 09:48:37,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 61 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:37,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2021-11-09 09:48:37,458 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 23 [2021-11-09 09:48:37,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:37,458 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2021-11-09 09:48:37,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:37,459 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2021-11-09 09:48:37,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 09:48:37,460 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:37,460 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:37,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:48:37,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:48:37,661 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:37,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:37,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1832157868, now seen corresponding path program 3 times [2021-11-09 09:48:37,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:48:37,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124905936] [2021-11-09 09:48:37,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:48:37,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:48:37,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:48:37,663 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:48:37,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-09 09:48:37,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:48:37,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:48:37,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 09:48:37,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:48:38,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:48:38,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:48:38,456 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:48:38,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124905936] [2021-11-09 09:48:38,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124905936] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:48:38,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:48:38,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-11-09 09:48:38,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966496444] [2021-11-09 09:48:38,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 09:48:38,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:48:38,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 09:48:38,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:48:38,459 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:39,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:39,607 INFO L93 Difference]: Finished difference Result 81 states and 99 transitions. [2021-11-09 09:48:39,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:48:39,611 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-09 09:48:39,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:39,612 INFO L225 Difference]: With dead ends: 81 [2021-11-09 09:48:39,612 INFO L226 Difference]: Without dead ends: 53 [2021-11-09 09:48:39,613 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:48:39,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-09 09:48:39,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-11-09 09:48:39,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:39,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2021-11-09 09:48:39,621 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 24 [2021-11-09 09:48:39,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:39,622 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2021-11-09 09:48:39,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:39,622 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2021-11-09 09:48:39,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:48:39,623 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:39,623 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:39,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-09 09:48:39,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:48:39,833 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:39,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:39,833 INFO L85 PathProgramCache]: Analyzing trace with hash -14433298, now seen corresponding path program 4 times [2021-11-09 09:48:39,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:48:39,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175325150] [2021-11-09 09:48:39,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:48:39,834 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:48:39,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:48:39,835 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:48:39,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-09 09:48:40,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:48:40,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:48:40,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 09:48:40,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:40,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:48:40,176 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-11-09 09:48:40,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-09 09:48:40,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 09:48:40,265 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-09 09:48:40,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2021-11-09 09:48:40,531 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-09 09:48:40,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 50 [2021-11-09 09:48:41,451 INFO L354 Elim1Store]: treesize reduction 112, result has 7.4 percent of original size [2021-11-09 09:48:41,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 55 [2021-11-09 09:48:41,906 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-09 09:48:41,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 48 [2021-11-09 09:48:42,384 INFO L354 Elim1Store]: treesize reduction 73, result has 15.1 percent of original size [2021-11-09 09:48:42,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 69 [2021-11-09 09:48:42,905 INFO L354 Elim1Store]: treesize reduction 260, result has 10.3 percent of original size [2021-11-09 09:48:42,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 119 treesize of output 75 [2021-11-09 09:48:43,273 INFO L354 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2021-11-09 09:48:43,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 142 treesize of output 90 [2021-11-09 09:48:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:48:43,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:49:23,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:49:23,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:49:23,435 INFO L354 Elim1Store]: treesize reduction 618, result has 0.2 percent of original size [2021-11-09 09:49:23,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 3849422126 treesize of output 1 [2021-11-09 09:49:23,453 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:49:23,453 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:49:23,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1175325150] [2021-11-09 09:49:23,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1175325150] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:49:23,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:49:23,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-11-09 09:49:23,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740122495] [2021-11-09 09:49:23,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-09 09:49:23,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:49:23,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-09 09:49:23,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1194, Unknown=5, NotChecked=0, Total=1406 [2021-11-09 09:49:23,457 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 38 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:49:44,069 WARN L207 SmtUtils]: Spent 7.69 s on a formula simplification. DAG size of input: 117 DAG size of output: 112 [2021-11-09 09:50:12,361 WARN L207 SmtUtils]: Spent 14.31 s on a formula simplification. DAG size of input: 133 DAG size of output: 54 [2021-11-09 09:50:41,452 WARN L207 SmtUtils]: Spent 22.19 s on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-11-09 09:50:48,421 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse15 (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)))) (let ((.cse44 (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base)) (.cse45 (bvadd .cse15 c_ULTIMATE.start_main_~a~0.offset))) (let ((.cse70 (select .cse44 .cse45))) (let ((.cse31 (bvslt (bvadd c_ULTIMATE.start_main_~i~0 (_ bv1 32)) c_~N~0)) (.cse14 (not (= .cse70 (_ bv1 32)))) (.cse5 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~a~0.offset)) (.cse3 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#sum~0.offset|)) (.cse10 (store .cse44 .cse45 (bvadd (_ bv3 32) .cse70))) (.cse13 ((_ sign_extend 32) (bvmul c_~N~0 (_ bv4 32))))) (and (let ((.cse11 (bvadd (_ bv4 32) .cse15 c_ULTIMATE.start_main_~a~0.offset))) (let ((.cse12 (select .cse10 .cse11))) (or (= (let ((.cse9 (store .cse10 .cse11 (bvadd (_ bv3 32) .cse12)))) (let ((.cse4 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse9))) (let ((.cse7 (select .cse4 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse8 (bvadd ((_ sign_extend 32) (select .cse9 c_ULTIMATE.start_main_~a~0.offset)) (concat (select .cse7 .cse3) (select .cse7 |c_ULTIMATE.start_main_~#sum~0.offset|))))) (let ((.cse6 ((_ extract 63 32) .cse8))) (let ((.cse1 (store (store .cse7 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse8)) .cse3 .cse6))) (let ((.cse2 (bvadd ((_ sign_extend 32) (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0.base| .cse1) c_ULTIMATE.start_main_~a~0.base) .cse5)) (concat .cse6 (select .cse1 |c_ULTIMATE.start_main_~#sum~0.offset|))))) (let ((.cse0 ((_ extract 63 32) .cse2))) (concat .cse0 (select (store (store .cse1 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse2)) .cse3 .cse0) |c_ULTIMATE.start_main_~#sum~0.offset|)))))))))) .cse13) .cse14 (not (= .cse12 (_ bv1 32)))))) (or (forall ((ULTIMATE.start_main_~a~0.offset (_ BitVec 32))) (let ((.cse29 (let ((.cse30 (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)))) (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (bvadd .cse30 ULTIMATE.start_main_~a~0.offset) (_ bv1 32)) (bvadd (_ bv4 32) .cse30 ULTIMATE.start_main_~a~0.offset) (_ bv1 32))))) (let ((.cse28 (select .cse29 ULTIMATE.start_main_~a~0.offset))) (let ((.cse26 (store .cse29 ULTIMATE.start_main_~a~0.offset (bvadd (_ bv3 32) .cse28))) (.cse22 (bvadd (_ bv4 32) ULTIMATE.start_main_~a~0.offset))) (let ((.cse27 (select .cse26 .cse22))) (or (= (let ((.cse25 (store .cse26 .cse22 (bvadd .cse27 (_ bv3 32))))) (let ((.cse21 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse25))) (let ((.cse19 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#sum~0.offset|)) (.cse23 (select .cse21 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse24 (bvadd ((_ sign_extend 32) (select .cse25 ULTIMATE.start_main_~a~0.offset)) (concat (select .cse23 .cse19) (select .cse23 |c_ULTIMATE.start_main_~#sum~0.offset|))))) (let ((.cse20 ((_ extract 63 32) .cse24))) (let ((.cse17 (store (store .cse23 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse24)) .cse19 .cse20))) (let ((.cse18 (bvadd (concat .cse20 (select .cse17 |c_ULTIMATE.start_main_~#sum~0.offset|)) ((_ sign_extend 32) (select (select (store .cse21 |c_ULTIMATE.start_main_~#sum~0.base| .cse17) c_ULTIMATE.start_main_~a~0.base) .cse22))))) (let ((.cse16 ((_ extract 63 32) .cse18))) (concat .cse16 (select (store (store .cse17 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse18)) .cse19 .cse16) |c_ULTIMATE.start_main_~#sum~0.offset|)))))))))) ((_ sign_extend 32) (bvmul c_~N~0 (_ bv4 32)))) (not (= .cse28 (_ bv1 32))) (not (= .cse27 (_ bv1 32))))))))) (bvslt (bvadd (_ bv2 32) c_ULTIMATE.start_main_~i~0) c_~N~0) (not .cse31)) (let ((.cse43 (store .cse44 .cse45 (_ bv1 32)))) (let ((.cse42 (select .cse43 c_ULTIMATE.start_main_~a~0.offset))) (let ((.cse41 (store .cse43 c_ULTIMATE.start_main_~a~0.offset (bvadd (_ bv3 32) .cse42)))) (let ((.cse32 (select .cse41 .cse5))) (or (not (= (_ bv1 32) .cse32)) .cse31 (= (let ((.cse40 (store .cse41 .cse5 (bvadd (_ bv3 32) .cse32)))) (let ((.cse36 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse40))) (let ((.cse38 (select .cse36 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse39 (bvadd (concat (select .cse38 .cse3) (select .cse38 |c_ULTIMATE.start_main_~#sum~0.offset|)) ((_ sign_extend 32) (select .cse40 c_ULTIMATE.start_main_~a~0.offset))))) (let ((.cse37 ((_ extract 63 32) .cse39))) (let ((.cse34 (store (store .cse38 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse39)) .cse3 .cse37))) (let ((.cse35 (bvadd ((_ sign_extend 32) (select (select (store .cse36 |c_ULTIMATE.start_main_~#sum~0.base| .cse34) c_ULTIMATE.start_main_~a~0.base) .cse5)) (concat .cse37 (select .cse34 |c_ULTIMATE.start_main_~#sum~0.offset|))))) (let ((.cse33 ((_ extract 63 32) .cse35))) (concat .cse33 (select (store (store .cse34 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse35)) .cse3 .cse33) |c_ULTIMATE.start_main_~#sum~0.offset|)))))))))) .cse13) (not (bvslt c_ULTIMATE.start_main_~i~0 c_~N~0)) (not (= .cse42 (_ bv1 32)))))))) (let ((.cse46 (select .cse44 c_ULTIMATE.start_main_~a~0.offset))) (let ((.cse55 (store .cse44 c_ULTIMATE.start_main_~a~0.offset (bvadd (_ bv3 32) .cse46)))) (let ((.cse56 (select .cse55 .cse5))) (or (not (= .cse46 (_ bv1 32))) (= (let ((.cse54 (store .cse55 .cse5 (bvadd (_ bv3 32) .cse56)))) (let ((.cse50 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse54))) (let ((.cse52 (select .cse50 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse53 (bvadd ((_ sign_extend 32) (select .cse54 c_ULTIMATE.start_main_~a~0.offset)) (concat (select .cse52 .cse3) (select .cse52 |c_ULTIMATE.start_main_~#sum~0.offset|))))) (let ((.cse51 ((_ extract 63 32) .cse53))) (let ((.cse48 (store (store .cse52 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse53)) .cse3 .cse51))) (let ((.cse49 (bvadd ((_ sign_extend 32) (select (select (store .cse50 |c_ULTIMATE.start_main_~#sum~0.base| .cse48) c_ULTIMATE.start_main_~a~0.base) .cse5)) (concat .cse51 (select .cse48 |c_ULTIMATE.start_main_~#sum~0.offset|))))) (let ((.cse47 ((_ extract 63 32) .cse49))) (concat .cse47 (select (store (store .cse48 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse49)) .cse3 .cse47) |c_ULTIMATE.start_main_~#sum~0.offset|)))))))))) .cse13) (not (= .cse56 (_ bv1 32))))))) (exists ((ULTIMATE.start_main_~a~0.offset (_ BitVec 32)) (ULTIMATE.start_main_~a~0.base (_ BitVec 32))) (let ((.cse59 (select |c_#memory_int| ULTIMATE.start_main_~a~0.base))) (let ((.cse60 (select .cse59 (bvadd (_ bv4 32) ULTIMATE.start_main_~a~0.offset)))) (let ((.cse57 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|)) (.cse58 (bvadd ((_ sign_extend 32) .cse60) (let ((.cse61 (bvadd ((_ sign_extend 32) (_ bv4 32)) (concat ((_ extract 63 32) (_ bv0 64)) (_ bv0 32))))) (concat ((_ extract 63 32) .cse61) ((_ extract 31 0) .cse61)))))) (and (= (select .cse57 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#sum~0.offset|)) ((_ extract 63 32) .cse58)) (= (_ bv4 32) (select .cse59 ULTIMATE.start_main_~a~0.offset)) (= .cse60 (_ bv4 32)) (not (= ULTIMATE.start_main_~a~0.base |c_ULTIMATE.start_main_~#sum~0.base|)) (= (select .cse57 |c_ULTIMATE.start_main_~#sum~0.offset|) ((_ extract 31 0) .cse58))))))) (bvslt (_ bv1 32) c_~N~0) (let ((.cse62 (bvule c_~N~0 (_ bv536870911 32)))) (or (and (= c_ULTIMATE.start_assume_abort_if_not_~cond (_ bv0 32)) (not .cse62)) (and .cse62 (= c_ULTIMATE.start_assume_abort_if_not_~cond (_ bv1 32))))) (not (bvsle c_~N~0 (_ bv0 32))) (not (bvslt (_ bv2 32) c_~N~0)) (or .cse14 (= (let ((.cse66 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse10))) (let ((.cse68 (select .cse66 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse69 (bvadd (concat (select .cse68 .cse3) (select .cse68 |c_ULTIMATE.start_main_~#sum~0.offset|)) ((_ sign_extend 32) (select .cse10 c_ULTIMATE.start_main_~a~0.offset))))) (let ((.cse67 ((_ extract 63 32) .cse69))) (let ((.cse64 (store (store .cse68 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse69)) .cse3 .cse67))) (let ((.cse65 (bvadd ((_ sign_extend 32) (select (select (store .cse66 |c_ULTIMATE.start_main_~#sum~0.base| .cse64) c_ULTIMATE.start_main_~a~0.base) .cse5)) (concat .cse67 (select .cse64 |c_ULTIMATE.start_main_~#sum~0.offset|))))) (let ((.cse63 ((_ extract 63 32) .cse65))) (concat .cse63 (select (store (store .cse64 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse65)) .cse3 .cse63) |c_ULTIMATE.start_main_~#sum~0.offset|))))))))) .cse13))))))) is different from true [2021-11-09 09:50:51,837 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse15 (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)))) (let ((.cse45 (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base)) (.cse46 (bvadd .cse15 c_ULTIMATE.start_main_~a~0.offset))) (let ((.cse65 (select .cse45 .cse46))) (let ((.cse32 (bvslt (bvadd c_ULTIMATE.start_main_~i~0 (_ bv1 32)) c_~N~0)) (.cse16 (bvule c_~N~0 (_ bv536870911 32))) (.cse14 (not (= .cse65 (_ bv1 32)))) (.cse5 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~a~0.offset)) (.cse3 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#sum~0.offset|)) (.cse10 (store .cse45 .cse46 (bvadd (_ bv3 32) .cse65))) (.cse13 ((_ sign_extend 32) (bvmul c_~N~0 (_ bv4 32))))) (and (let ((.cse11 (bvadd (_ bv4 32) .cse15 c_ULTIMATE.start_main_~a~0.offset))) (let ((.cse12 (select .cse10 .cse11))) (or (= (let ((.cse9 (store .cse10 .cse11 (bvadd (_ bv3 32) .cse12)))) (let ((.cse4 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse9))) (let ((.cse7 (select .cse4 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse8 (bvadd ((_ sign_extend 32) (select .cse9 c_ULTIMATE.start_main_~a~0.offset)) (concat (select .cse7 .cse3) (select .cse7 |c_ULTIMATE.start_main_~#sum~0.offset|))))) (let ((.cse6 ((_ extract 63 32) .cse8))) (let ((.cse1 (store (store .cse7 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse8)) .cse3 .cse6))) (let ((.cse2 (bvadd ((_ sign_extend 32) (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0.base| .cse1) c_ULTIMATE.start_main_~a~0.base) .cse5)) (concat .cse6 (select .cse1 |c_ULTIMATE.start_main_~#sum~0.offset|))))) (let ((.cse0 ((_ extract 63 32) .cse2))) (concat .cse0 (select (store (store .cse1 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse2)) .cse3 .cse0) |c_ULTIMATE.start_main_~#sum~0.offset|)))))))))) .cse13) .cse14 (not (= .cse12 (_ bv1 32)))))) .cse16 (or (forall ((ULTIMATE.start_main_~a~0.offset (_ BitVec 32))) (let ((.cse30 (let ((.cse31 (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)))) (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (bvadd .cse31 ULTIMATE.start_main_~a~0.offset) (_ bv1 32)) (bvadd (_ bv4 32) .cse31 ULTIMATE.start_main_~a~0.offset) (_ bv1 32))))) (let ((.cse29 (select .cse30 ULTIMATE.start_main_~a~0.offset))) (let ((.cse27 (store .cse30 ULTIMATE.start_main_~a~0.offset (bvadd (_ bv3 32) .cse29))) (.cse23 (bvadd (_ bv4 32) ULTIMATE.start_main_~a~0.offset))) (let ((.cse28 (select .cse27 .cse23))) (or (= (let ((.cse26 (store .cse27 .cse23 (bvadd .cse28 (_ bv3 32))))) (let ((.cse22 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse26))) (let ((.cse20 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#sum~0.offset|)) (.cse24 (select .cse22 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse25 (bvadd ((_ sign_extend 32) (select .cse26 ULTIMATE.start_main_~a~0.offset)) (concat (select .cse24 .cse20) (select .cse24 |c_ULTIMATE.start_main_~#sum~0.offset|))))) (let ((.cse21 ((_ extract 63 32) .cse25))) (let ((.cse18 (store (store .cse24 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse25)) .cse20 .cse21))) (let ((.cse19 (bvadd (concat .cse21 (select .cse18 |c_ULTIMATE.start_main_~#sum~0.offset|)) ((_ sign_extend 32) (select (select (store .cse22 |c_ULTIMATE.start_main_~#sum~0.base| .cse18) c_ULTIMATE.start_main_~a~0.base) .cse23))))) (let ((.cse17 ((_ extract 63 32) .cse19))) (concat .cse17 (select (store (store .cse18 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse19)) .cse20 .cse17) |c_ULTIMATE.start_main_~#sum~0.offset|)))))))))) ((_ sign_extend 32) (bvmul c_~N~0 (_ bv4 32)))) (not (= .cse29 (_ bv1 32))) (not (= .cse28 (_ bv1 32))))))))) (bvslt (bvadd (_ bv2 32) c_ULTIMATE.start_main_~i~0) c_~N~0) (not .cse32)) (let ((.cse44 (store .cse45 .cse46 (_ bv1 32)))) (let ((.cse43 (select .cse44 c_ULTIMATE.start_main_~a~0.offset))) (let ((.cse42 (store .cse44 c_ULTIMATE.start_main_~a~0.offset (bvadd (_ bv3 32) .cse43)))) (let ((.cse33 (select .cse42 .cse5))) (or (not (= (_ bv1 32) .cse33)) .cse32 (= (let ((.cse41 (store .cse42 .cse5 (bvadd (_ bv3 32) .cse33)))) (let ((.cse37 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse41))) (let ((.cse39 (select .cse37 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse40 (bvadd (concat (select .cse39 .cse3) (select .cse39 |c_ULTIMATE.start_main_~#sum~0.offset|)) ((_ sign_extend 32) (select .cse41 c_ULTIMATE.start_main_~a~0.offset))))) (let ((.cse38 ((_ extract 63 32) .cse40))) (let ((.cse35 (store (store .cse39 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse40)) .cse3 .cse38))) (let ((.cse36 (bvadd ((_ sign_extend 32) (select (select (store .cse37 |c_ULTIMATE.start_main_~#sum~0.base| .cse35) c_ULTIMATE.start_main_~a~0.base) .cse5)) (concat .cse38 (select .cse35 |c_ULTIMATE.start_main_~#sum~0.offset|))))) (let ((.cse34 ((_ extract 63 32) .cse36))) (concat .cse34 (select (store (store .cse35 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse36)) .cse3 .cse34) |c_ULTIMATE.start_main_~#sum~0.offset|)))))))))) .cse13) (not (bvslt c_ULTIMATE.start_main_~i~0 c_~N~0)) (not (= .cse43 (_ bv1 32)))))))) (let ((.cse47 (select .cse45 c_ULTIMATE.start_main_~a~0.offset))) (let ((.cse56 (store .cse45 c_ULTIMATE.start_main_~a~0.offset (bvadd (_ bv3 32) .cse47)))) (let ((.cse57 (select .cse56 .cse5))) (or (not (= .cse47 (_ bv1 32))) (= (let ((.cse55 (store .cse56 .cse5 (bvadd (_ bv3 32) .cse57)))) (let ((.cse51 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse55))) (let ((.cse53 (select .cse51 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse54 (bvadd ((_ sign_extend 32) (select .cse55 c_ULTIMATE.start_main_~a~0.offset)) (concat (select .cse53 .cse3) (select .cse53 |c_ULTIMATE.start_main_~#sum~0.offset|))))) (let ((.cse52 ((_ extract 63 32) .cse54))) (let ((.cse49 (store (store .cse53 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse54)) .cse3 .cse52))) (let ((.cse50 (bvadd ((_ sign_extend 32) (select (select (store .cse51 |c_ULTIMATE.start_main_~#sum~0.base| .cse49) c_ULTIMATE.start_main_~a~0.base) .cse5)) (concat .cse52 (select .cse49 |c_ULTIMATE.start_main_~#sum~0.offset|))))) (let ((.cse48 ((_ extract 63 32) .cse50))) (concat .cse48 (select (store (store .cse49 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse50)) .cse3 .cse48) |c_ULTIMATE.start_main_~#sum~0.offset|)))))))))) .cse13) (not (= .cse57 (_ bv1 32))))))) (or (and (= c_ULTIMATE.start_assume_abort_if_not_~cond (_ bv0 32)) (not .cse16)) (and .cse16 (= c_ULTIMATE.start_assume_abort_if_not_~cond (_ bv1 32)))) (not (bvsle c_~N~0 (_ bv0 32))) (or .cse14 (= (let ((.cse61 (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse10))) (let ((.cse63 (select .cse61 |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse64 (bvadd (concat (select .cse63 .cse3) (select .cse63 |c_ULTIMATE.start_main_~#sum~0.offset|)) ((_ sign_extend 32) (select .cse10 c_ULTIMATE.start_main_~a~0.offset))))) (let ((.cse62 ((_ extract 63 32) .cse64))) (let ((.cse59 (store (store .cse63 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse64)) .cse3 .cse62))) (let ((.cse60 (bvadd ((_ sign_extend 32) (select (select (store .cse61 |c_ULTIMATE.start_main_~#sum~0.base| .cse59) c_ULTIMATE.start_main_~a~0.base) .cse5)) (concat .cse62 (select .cse59 |c_ULTIMATE.start_main_~#sum~0.offset|))))) (let ((.cse58 ((_ extract 63 32) .cse60))) (concat .cse58 (select (store (store .cse59 |c_ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse60)) .cse3 .cse58) |c_ULTIMATE.start_main_~#sum~0.offset|))))))))) .cse13))))))) is different from true [2021-11-09 09:51:01,030 WARN L207 SmtUtils]: Spent 6.60 s on a formula simplification. DAG size of input: 134 DAG size of output: 101 [2021-11-09 09:51:21,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:21,000 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2021-11-09 09:51:21,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 09:51:21,003 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 38 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-09 09:51:21,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:21,004 INFO L225 Difference]: With dead ends: 82 [2021-11-09 09:51:21,004 INFO L226 Difference]: Without dead ends: 64 [2021-11-09 09:51:21,006 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 127.3s TimeCoverageRelationStatistics Valid=491, Invalid=2814, Unknown=9, NotChecked=226, Total=3540 [2021-11-09 09:51:21,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-09 09:51:21,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2021-11-09 09:51:21,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:21,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-11-09 09:51:21,015 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 29 [2021-11-09 09:51:21,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:21,016 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-11-09 09:51:21,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 38 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:21,016 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-11-09 09:51:21,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:51:21,017 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:21,018 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:21,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-09 09:51:21,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:51:21,230 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:21,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:21,230 INFO L85 PathProgramCache]: Analyzing trace with hash 42825004, now seen corresponding path program 1 times [2021-11-09 09:51:21,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:51:21,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767081505] [2021-11-09 09:51:21,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:21,231 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:51:21,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:51:21,232 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:51:21,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5aa4593-144d-4855-a3ab-b7ae22f8e175/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-09 09:51:21,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:21,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:51:21,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:21,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-11-09 09:51:21,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2021-11-09 09:51:21,940 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-09 09:51:21,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 25 [2021-11-09 09:51:22,364 INFO L354 Elim1Store]: treesize reduction 424, result has 8.0 percent of original size [2021-11-09 09:51:22,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 85 treesize of output 62 [2021-11-09 09:51:28,683 INFO L354 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2021-11-09 09:51:28,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 32 [2021-11-09 09:51:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:51:28,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:51:30,949 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#sum~0.offset| (_ BitVec 32))) (= (_ bv4 32) (let ((.cse3 (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base| (let ((.cse2 (bvadd (_ bv4 32) |ULTIMATE.start_main_~#sum~0.offset|)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse1 (bvadd (concat (select .cse0 .cse2) (select .cse0 |ULTIMATE.start_main_~#sum~0.offset|)) ((_ sign_extend 32) (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (bvadd .cse3 c_ULTIMATE.start_main_~a~0.offset)))))) (store (store .cse0 |ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse1)) .cse2 ((_ extract 63 32) .cse1))))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv4 32) .cse3 c_ULTIMATE.start_main_~a~0.offset))))) is different from false [2021-11-09 09:51:33,018 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#sum~0.offset| (_ BitVec 32))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base| (let ((.cse2 (bvadd (_ bv4 32) |ULTIMATE.start_main_~#sum~0.offset|)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse1 (bvadd ((_ sign_extend 32) (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset)) (concat (select .cse0 .cse2) (select .cse0 |ULTIMATE.start_main_~#sum~0.offset|))))) (store (store .cse0 |ULTIMATE.start_main_~#sum~0.offset| ((_ extract 31 0) .cse1)) .cse2 ((_ extract 63 32) .cse1))))) c_ULTIMATE.start_main_~a~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~a~0.offset)) (_ bv4 32))) is different from false [2021-11-09 09:51:40,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:51:40,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 405788 treesize of output 362686